Hyperbola noun [ Greek ..., prop., an overshooting, excess, i. e. , of the angle which the cutting plane makes with the base. See Hyperbole .] (Geom.) A curve formed by a section of a cone, when the cutting plane makes a greater angle with the base than the side of the cone makes. It is a plane curve such that the difference of the distances from any point of it to two fixed points, called foci , is equal to a given distance. See Focus . If the cutting plane be produced so as to cut the opposite cone, another curve will be formed, which is also an hyperbola. Both curves are regarded as branches of the same hyperbola. See Illust. of Conic section , and Focus .

Hyperbole noun [ Latin , from Gr..., prop., an overshooting, excess, from Greek ... to throw over or beyond; "ype`r over + ... to throw. See Hyper- , Parable , and confer Hyperbola .] (Rhet.) A figure of speech in which the expression is an evident exaggeration of the meaning intended to be conveyed, or by which things are represented as much greater or less, better or worse, than they really are; a statement exaggerated fancifully, through excitement, or for effect.

Our common forms of compliment are almost all of them extravagant hyperboles .

Blair.

Somebody has said of the boldest figure in rhetoric, the hyperbole , that it lies without deceiving.

Macaulay.

Hyperbolic, Hyperbolical adjective [ Latin hyperbolicus , Greek ...: confer French hyperbolique .]
1. (Math.) Belonging to the hyperbola; having the nature of the hyperbola.

2. (Rhet.) Relating to, containing, or of the nature of, hyperbole; exaggerating or diminishing beyond the fact; exceeding the truth; as, an hyperbolical expression. "This hyperbolical epitaph." Fuller.

Hyperbolic functions (Math.) , certain functions which have relations to the hyperbola corresponding to those which sines, cosines, tangents, etc., have to the circle; and hence, called hyperbolic sines , hyperbolic cosines , etc. -- Hyperbolic logarithm . See Logarithm . -- Hyperbolic spiral (Math.) , a spiral curve, the law of which is, that the distance from the pole to the generating point varies inversely as the angle swept over by the radius vector.

Hyperbolically adverb
1. (Math.) In the form of an hyperbola.

2. (Rhet.) With exaggeration; in a manner to express more or less than the truth. Sir W. Raleigh.

Hyperboliform adjective [ Hyperbola + -form .] Having the form, or nearly the form, of an hyperbola.

Hyperbolism noun [ Confer French hyperbolisme .] The use of hyperbole. Jefferson.

Hyperbolist noun One who uses hyperboles.

Hyperbolize intransitive verb [ imperfect & past participle Hyperbolized ; present participle & verbal noun Hyperbolizing .] [ Confer French hyperboliser .] To speak or write with exaggeration. Bp. Montagu.

Hyperbolize transitive verb To state or represent hyperbolically. Fotherby.

Hyperboloid noun [ Hyperbola + -oid : confer French hyperboloïde .] (Geom.) A surface of the second order, which is cut by certain planes in hyperbolas; also, the solid, bounded in part by such a surface.

Hyperboloid of revolution , an hyperboloid described by an hyperbola revolving about one of its axes. The surface has two separate sheets when the axis of revolution is the transverse axis, but only one when the axis of revolution is the conjugate axis of the hyperbola.

Hyperboloid adjective (Geom.) Having some property that belongs to an hyperboloid or hyperbola.

Hyperborean adjective [ Latin hyperboreus , Greek ...; "ype`r over, beyond + .... See Boreas .]
1. (Greek Myth.) Of or pertaining to the region beyond the North wind, or to its inhabitants.

2. Northern; belonging to, or inhabiting, a region in very far north; most northern; hence, very cold; fright, as, a hyperborean coast or atmosphere.

The hyperborean or frozen sea.

C. Butler (1633).

Hyperborean noun
1. (Greek Myth.) One of the people who lived beyond the North wind, in a land of perpetual sunshine.

2. An inhabitant of the most northern regions.

Hypercarbureted adjective (Chemistry) Having an excessive proportion of carbonic acid; -- said of bicarbonates or acid carbonates. [ Written also hypercarburetted .]

Hypercatalectic adjective [ Latin hypercatalecticus , hypercatalectus , Greek ...: confer French hypercatalectique . See Hyper- , and Catalectic .] (Pros.) Having a syllable or two beyond measure; as, a hypercatalectic verse.

Hyperchloric adjective (Chemistry) See Perchloric .

Hyperchromatism noun The condition of having an unusual intensity of color.

Hypercritic noun [ Prefix hyper- + critic : confer French hypercritique .] One who is critical beyond measure or reason; a carping critic; a captious censor. " Hypercritics in English poetry." Dryden.

Hypercritic adjective Hypercritical.

Hypercritical adjective
1. Over critical; unreasonably or unjustly critical; carping; captious. " Hypercritical readers." Swift.

2. Excessively nice or exact. Evelyn.

Hypercritically adverb In a hypercritical manner.

Hypercriticise transitive verb To criticise with unjust severity; to criticise captiously.

Hypercriticism noun Excessive criticism, or unjust severity or rigor of criticism; zoilism.

Hyperdicrotic adjective (Physiol.) Excessive dicrotic; as, a hyperdicrotic pulse.

Hyperdicrotism noun (Physiol.) A hyperdicrotic condition.

Hyperdicrotous adjective (Physiol.) Hyperdicrotic.

Hyperdulia noun [ Prefix hyper- + dulia : confer French hyperdulie .] (R. C. Ch.) Veneration or worship given to the Virgin Mary as the most exalted of mere creatures; higher veneration than dulia. Addis & Arnold.

Hyperduly noun Hyperdulia. [ Obsolete]

Hyperesthesia noun Same as Hyperæsthesia .

Hypericum noun [ Latin , from Greek ..., ...; ... under, among + ..., ..., heath, heather.] (Botany) A genus of plants, generally with dotted leaves and yellow flowers; -- called also St. John's-wort .

Hyperinosis noun [ New Latin , from Greek "ype`r over + ..., ..., strength, fiber.] (Medicine) A condition of the blood, characterized by an abnormally large amount of fibrin, as in many inflammatory diseases.

Hyperion noun [ Latin , from Greek ....] (Class Myth.) The god of the sun; in the later mythology identified with Apollo, and distinguished for his beauty.

So excellent a king; that was, to this,
Hyperion to a satyr.

Shak.

Hyperkinesis noun [ New Latin , from Greek "ype`r over + ... motion.] (Medicine) Abnormally increased muscular movement; spasm.

Hyperkinetic adjective Of or pertaining to hyperkinesis.

Hypermetamorphosis noun [ Hyper- + metamorphosis .] (Zoology) A kind of metamorphosis, in certain insects, in which the larva itself undergoes remarkable changes of form and structure during its growth.

Hypermeter noun [ Greek ... beyond all measure; "ype`r over, beyond + ... measure: confer French hypermètre .]
1. (Pros.) A verse which has a redundant syllable or foot; a hypercatalectic verse.

2. Hence, anything exceeding the ordinary standard.

When a man rises beyond six foot, he is an hypermeter .

Addison.

Hypermetrical adjective Having a redundant syllable; exceeding the common measure.

Hypermetrical verse (Gr. & Lat. Pros.) , a verse which contains a syllable more than the ordinary measure.

Hypermetropia, Hypermetropy noun [ New Latin hypermetropia , from Greek ... excessive + ..., ..., the eye. See Hypermeter .] A condition of the eye in which, through shortness of the eyeball or fault of the refractive media, the rays of light come to a focus behind the retina; farsightedness; -- called also hyperopia . Confer Emmetropia .

» In hypermetropia , vision for distant objects, although not better absolutely, is better than that for near objects, and hence, the individual is said to be farsighted. It is corrected by the use of convex glasses.

-- Hy`per*me*trop"ic adjective

Hypermyriorama noun [ New Latin , from Greek ... beyond + ... countless + ... view.] A show or exhibition having a great number of scenes or views.

Hyperoartia noun plural [ New Latin ] (Zoology) An order of marsipobranchs including the lampreys. The suckerlike moth contains numerous teeth; the nasal opening is in the middle of the head above, but it does not connect with the mouth. See Cyclostoma , and Lamprey .

Hyperopia (hī`pẽr*ō"pĭ*ȧ) noun [ New Latin , from Greek "ype`r over + 'w`ps , 'wpo`s , the eye.] Hypermetropia. -- Hy`per*op"tic adjective

Hyperorganic (-ôr*găn"ĭk) adjective [ Prefix hyper- + organic .] Higher than, or beyond the sphere of, the organic. Sir W. Hamilton.

Hyperorthodoxy noun Orthodoxy pushed to excess.

Hyperotreta (hī`pẽr*o*trē"tȧ) noun plural [ New Latin , from Greek "yperw`,n the palate + trhto`s perforated.] (Zoology) An order of marsipobranchs, including the Myxine or hagfish and the genus Bdellostoma . They have barbels around the mouth, one tooth on the palate, and a communication between the nasal aperture and the throat. See Hagfish . [ Written also Hyperotreti .]

Hyperoxide noun (Chemistry) A compound having a relatively large percentage of oxygen; a peroxide. [ Obsolete]

Hyperoxygenated, Hyperoxygenized adjective (Chemistry) Combined with a relatively large amount of oxygen; -- said of higher oxides. [ Obsolete]

Hyperoxymuriate noun (Chemistry) A perchlorate. [ Obsolete]

Hyperoxymuriatic adjective (Chemistry) Perchloric; as, hyperoxymuriatic acid. [ Obsolete]

Hyperphysical adjective Above or transcending physical laws; supernatural.

Those who do not fly to some hyperphysical hypothesis.

Sir W. Hamilton.

Hyperplasia noun [ New Latin , from Greek "ype`r over + ... conformation, from ... to mold.] (Med. & Biol.) An increase in, or excessive growth of, the normal elements of any part.

» Hyperplasia relates to the formation of new elements, hypertrophy being an increase in bulk of preexisting normal elements. Dunglison.